From the historical study of taxidermy as a form of art, it is evident that the practice is deeply woven into the cultural fabric of Pennsylvania. As we gaze into the telescopic lens of the future, we can see several emerging trends that are set to redefine the contours of this timeless craft in the state.

One of the primary shifts in the taxidermy landscape in Pennsylvania pertains to the adoption of technology. Akin to most other domains, taxidermy has not remained impervious to the transformative potential of cutting-edge tech innovations. Novel digital techniques, such as 3D printing, have already started to make inroads into the practice. This development promises to impart a new dimension of precision and detail to the taxidermied specimens, thereby pushing the boundaries of realism.

However, this embrace of technology is not without its trade-offs. One of the potential pitfalls is a possible dilution of the traditional, hands-on craftsmanship that forms the bedrock of taxidermy. The resultant specimens, although more accurate in their form, may lack the character and individuality that come with handcrafted pieces. It is thus imperative for taxidermists to strike a balance between leveraging technology and preserving the essence of their craft.

On a demographic plane, there appears to be a gradually rising interest in taxidermy among younger generations in Pennsylvania. This is an encouraging trend for the future of the craft in the state. However, it also necessitates a rethinking of the instructional methods used in taxidermy. With younger audiences growing up in a digitally native environment, there is a need to incorporate more tech-based, interactive learning methods in the teaching of taxidermy. This evolution in pedagogical methodology can ensure that the craft continues to thrive in the hands of the younger generations.

There's also been a noticeable shift in the ethical landscape of taxidermy. Today, more taxidermists in Pennsylvania are opting for ethically sourced specimens. This trend is a response to the growing public awareness and concern about animal welfare issues. Consequently, there's also a notable increase in the use of roadkill and naturally deceased animals, thereby reducing the demand for hunting. Additionally, some taxidermists are also exploring the use of synthetic alternatives to traditional materials, which is another nod to the growing ethical consciousness in the field.

From a legal perspective, taxidermy in Pennsylvania is governed by specific laws and regulations, which are expected to evolve in the future in alignment with the changing societal values and technological advancements. Any comprehensive forecast about the future of taxidermy in Pennsylvania would be incomplete without taking into account potential legislative changes.

In conclusion, the future of taxidermy in Pennsylvania appears to be one of profound change and evolution, shaped by digital technology, demographic shifts, ethical considerations, and legal factors. The challenge for the practitioners will be to navigate these shifts in a way that respects the rich tradition of the craft while also adapting to the demands of the future. It is a delicate balancing act, but one that promises to yield a more nuanced and progressive form of taxidermy in Pennsylvania.